package org.test.aspect;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.reflect.Method;

/**
 * 切面代理
 * Created by Hy on 2018/7/9.
 */
public abstract class AspectProxy implements Proxy{
    private static final Logger logger = LoggerFactory.getLogger(AspectProxy.class);
    public final Object doProxy(ProxyChain proxyChain) throws Throwable {
        Object result = null;
        Class<?> cls = proxyChain.getTargetClass();
        Method method = proxyChain.getTargetMethod();
        Object[] params = proxyChain.getMethodParams();
        begin();
        try {
            if(intercept(cls,method,params)){
              before(cls,method,params);
              result = proxyChain.doProxyChain();
              after(cls,method,params,result);
            }else{
                result = proxyChain.doProxyChain();
            }

        }catch(Exception e){
           logger.error("proxy failure",e);
           error(cls,method,params,e);
           throw e;
        }finally {
            end();
        }
        return result;
    }

    public void error(Class<?> cls, Method method, Object[] params, Exception e) {
    }

    public void after(Class<?> cls, Method method, Object[] params, Object result) throws Throwable{};

    public void before(Class<?> clas, Method method, Object[] params) throws Throwable{
    }
    
    public boolean intercept(Class<?> clas, Method method, Object[] params) throws Throwable{
        return true;
    }

    public void end() {
    }

    public void begin() {
    }
}
